The BSA A7-A10 Forum

Technical (Descriptive Topic Titles - Stay on Topic) => Gearbox, Clutch, Primary => Topic started by: nimrod650 on 08.07. 2016 20:26

Title: inner primary
Post by: nimrod650 on 08.07. 2016 20:26

 inner primary



spacer thickness









 

Title: Re: inner primary
Post by: chaterlea25 on 08.07. 2016 21:21

Hi nimrod,
I seem to remember the orignals are 3/32in. ???? =0.093in
4mm is 0.160in app and 6mm is 0.240in  *????* *????*
The extra thickness will cause the case to interfere with the clutch and primary chain

I have made the spacers from alloy plate, machined to thickness required, the orignals are steel
the gaskets usually supplied are about 20 thou thick, adding an extra or leaving one out makes quite a difference when setting up the case position

John

Title: Re: inner primary
Post by: nimrod650 on 09.07. 2016 18:06

Quote from: chaterlea25 on 08.07. 2016 21:21

Hi nimrod,
I seem to remember the orignals are 3/32in. ???? =0.093in
4mm is 0.160in app and 6mm is 0.240in  *????* *????*
The extra thickness will cause the case to interfere with the clutch and primary chain

I have made the spacers from alloy plate, machined to thickness required, the orignals are steel
the gaskets usually supplied are about 20 thou thick, adding an extra or leaving one out makes quite a difference when setting up the case position

John so 2m lead might be ok

Title: Re: inner primary
Post by: chaterlea25 on 09.07. 2016 21:08

Hi Nimrood,

Quote

John so 2m lead might be ok

Dunno  *????* *????* *????*
It all depends on the the phase of the moon, your birth sign and a few more obscure parameters *dunno2*

John

Title: Re: inner primary
Post by: nimrod650 on 09.07. 2016 21:48

Quote from: chaterlea25 on 09.07. 2016 21:08

Hi Nimrood,

Quote

John so 2m lead might be ok

Dunno  *????* *????* *????*
It all depends on the the phase of the moon, your birth sign and a few more obscure parameters *dunno2*

John   full / aquarius /eyes blue/ hair grey/dogs called beezer car reg K1 SYM

Title: Re: inner primary
Post by: muskrat on 09.07. 2016 22:23

I think lead would be too soft and eventually squish with vibration and frame flex. I'd only use steel or alloy.
Cheers

Title: Re: inner primary
Post by: nimrod650 on 10.07. 2016 18:17

Quote from: muskrat on 09.07. 2016 22:23

I think lead would be too soft and eventually squish with vibration and frame flex. I'd only use steel or alloy.
Cheers

thanks for advice it was just easier to work with when limited to choice of tools will get the jig-saw out